Lucene Upgrader
This project attempts to make a single tool to upgrade Lucene indexes all the way through multiple versions. It does this by repackaging older versions of Lucene and using the IndexUpgrader tool from each version in turn.
Usage as a Library
Getting the dependency:
dependencies {
implementation("org.trypticon.luceneupgrader:luceneupgrader:VERSION")
}
To upgrade an index all the way to version 8:
new IndexUpgrader(textIndexPath, null)
.upgradeTo(LuceneVersion.VERSION_8);
The upgrade will be a no-op if the index is already at that version.
Upgrades can be done one step at a time by passing a different target version.
Usage of Command-Line Interface
Running the tool:
java -jar luceneupgrader-VERSION.jar
Given no additional arguments, the tool will output the available commands.
Building
To build and run all tests:
./gradlew build
To generate test Lucene indices, e.g. from one of the lucene
subdirectories
under testgen/
:
../../gradlew runAll